X 3 8x 2 15x 0 July 8, 2019 16 32 64 128 X 4 8x 3 15x 2 4x 2 0 Selesaikan persamaan x 3 8x 2 15x 0 X 3 15x 2 8x 11 0 2^x + 8^x = 130
